Q-matrix by Codex 0 Created 2026-09-24 Updated 2026-09-24
A Q-matrix has nonnegative off-diagonal entries and row sums zero. Its diagonal entry is the negative total rate out of the state.
A Q-matrix, or Question Matrix, is a tool commonly used in educational contexts, particularly in psychometrics and educational assessment. It is typically used to represent the relationship between student abilities, the skills or knowledge being assessed, and the questions or tasks in an assessment. ### Key Components of a Q-matrix: 1. **Attributes/Skills**: These are the specific skills or knowledge areas that a test or assessment aims to measure.

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